public AmqpReader(ReadOnlySpan <byte> buffer)
{
_buffer = buffer;
CurrentType = default;
_current = 0;
_currentLength = 0;
_next = 0;
_itemType = default;
}
public Converted(AmqpType amqpType, Type source, Type target,
Func <object, Type, object> getTarget, Func <object, Type, object> getSource)
: base(null, target)
{
this.AmqpType = amqpType;
this.source = source;
this.target = target;
this.getTarget = getTarget;
this.getSource = getSource;
this.encoder = AmqpEncoding.GetEncoding(target);
}
public static bool TryReadConstructor(Span <byte> span, out AmqpType constructor)
{
if (span.Length == 0)
{
constructor = default;
return(false);
}
constructor = (AmqpType)span[0];
if (constructor == AmqpType.String8)
{
return(true);
}
if (constructor == AmqpType.Descriptor)
{
return(true);
}
return(false);
}
public Converted(AmqpType amqpType, Type source, Type target,
Func<object, object> getTarget, Func<object, object> getSource)
: base(null, target)
{
this.AmqpType = amqpType;
this.source = source;
this.target = target;
this.GetTarget = getTarget;
this.GetSource = getSource;
this.encoder = AmqpEncoding.GetEncoding(target);
}
public AmqpToken MoveNext()
{
_buffer = _buffer.Slice(_next);
_next = 0;
if (_buffer.Length == 0)
{
return(AmqpToken.EndOfData);
}
var constructor = (AmqpType)_buffer[0];
switch (constructor)
{
case AmqpType.Descriptor:
_next++;
CurrentType = AmqpToken.Descriptor;
break;
case AmqpType.Binary8:
if (_buffer.Length == 1)
{
return(AmqpToken.EndOfData);
}
_currentLength = _buffer[1];
_current = 2;
_next += _currentLength + _current;
CurrentType = AmqpToken.Binary;
break;
case AmqpType.Binary32:
_currentLength = BinaryPrimitives.ReadInt32BigEndian(_buffer.Slice(1));
_current = 5;
_next += _currentLength + _current;
CurrentType = AmqpToken.Binary;
break;
case AmqpType.String8:
_current = 2;
_currentLength = _buffer[1];
_next += _currentLength + _current;
CurrentType = AmqpToken.String;
break;
case AmqpType.String32:
_current = 5;
_currentLength = BinaryPrimitives.ReadInt32BigEndian(_buffer.Slice(1));
_next += _currentLength + _current;
CurrentType = AmqpToken.String;
break;
case AmqpType.Array8:
{
if (_buffer.Length < 4)
{
return(AmqpToken.EndOfData);
}
var itemSize = _buffer[1];
_currentLength = _buffer[2];
_itemType = (AmqpType)_buffer[3];
_current = 4;
_next = _current + (_currentLength * itemSize);
CurrentType = AmqpToken.Array;
break;
}
case AmqpType.Array32:
{
if (_buffer.Length < 10)
{
return(AmqpToken.EndOfData);
}
var dataSize = BinaryPrimitives.ReadInt32BigEndian(_buffer.Slice(1)) - 5;
_currentLength = BinaryPrimitives.ReadInt32BigEndian(_buffer.Slice(5)) * sizeof(int);
_itemType = (AmqpType)_buffer[9];
_current = 10;
_next = _current + dataSize;
CurrentType = AmqpToken.Array;
break;
}
default:
throw new NotImplementedException();
}
return(CurrentType);
}
